jonah/raytracing
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

simplify Sphere#hit

Browse Source
This commit is contained in:
jbb01 2024-08-03 01:46:41 +02:00
parent 14fd1d73fc
commit e3a8b08381
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/main/java/eu/jonahbauer/raytracing/shape/Sphere.java
View File

@ -24,16 +24,16 @@ public record Sphere(@NotNull Vec3 center, double radius) implements Shape {
var oc = ray.origin().minus(center());
var a = ray.direction().squared();
var b = 2 * ray.direction().times(oc);
var h = ray.direction().times(oc);
var c = oc.squared() - radius * radius;
var discriminant = b * b - 4 * a * c;
var discriminant = h * h - a * c;
if (discriminant < 0) return Optional.empty();
var sd = Math.sqrt(discriminant);
double t = (- b - sd) / (2 * a);
if (t < 0) t = (-b + sd) / (2 * a);
double t = (- h - sd) / a;
if (t < 0) t = (- h + sd) / a;
if (t < 0) return Optional.empty();
return Optional.of(new HitResult(t, ray.at(t).minus(center)));
}